build(deps): bump discord-py from 2.3.2 to 2.4.0

Bumps [discord-py](https://github.com/Rapptz/discord.py) from 2.3.2 to 2.4.0.
- [Commits](Rapptz/discord.py@v2.3.2...v2.4.0)

---
updated-dependencies:
- dependency-name: discord-py
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

requirements.txt

@@ -1,4 +1,4 @@
-discord.py==2.3.2
+discord.py==2.4.0
 Pillow==10.3.0
 xkcd==2.4.2
 pytz==2024.1